fix(datepicker): fix support for literal format on popup
fix(datepicker): fix support for literal format on popup

- Add check for `uibDatepickerPopup`

Closes #4635
Fixes #4616

burlhock/bootstrap,pdsoftplan/bootstrap,looker/bootstrap,mabi/bootstrap,fpipita/bootstrap,davious/angular-ui-bootstrap,guaido79/bootstrap,sullivanpt/bootstrap,connyay/bootstrap,Foxandxss/bootstrap,mabi/bootstrap,realityking/ui-bootstrap,shadowdaw/bootstrap,292388900/bootstrap,pdsoftplan/bootstrap,angular-ui/bootstrap,burlhock/bootstrap,icfantv/bootstrap,wesleycho/bootstrap,guaido79/bootstrap,deeg/bootstrap,vfiles/bootstrap,Kpler/bootstrap,shiftagent/ui-bootstrap,benhalverson/bootstrap,fpipita/bootstrap,icfantv/bootstrap,christor/bootstrap,christor/bootstrap,byronigoe/bootstrap,davious/angular-ui-bootstrap,292388900/bootstrap,angular-ui/bootstrap,shadowdaw/bootstrap,shootermv/bootstrap,shiftagent/ui-bootstrap,byronigoe/bootstrap,infowrap/bootstrap,looker/bootstrap,Lincoln-xzc/angular-ui-bootstrap,BookingBug/bootstrap,infowrap/bootstrap,matteopic/bootstrap,benhalverson/bootstrap,Kpler/bootstrap,caoruiy/bootstrap,shootermv/bootstrap,realityking/ui-bootstrap,Servoy/bootstrap,RobJacobs/bootstrap,caoruiy/bootstrap,Foxandxss/bootstrap,benhalverson/bootstrap,justin-john/bootstrap-1,justin-john/bootstrap-1,vfiles/bootstrap,deeg/bootstrap,Lincoln-xzc/angular-ui-bootstrap,sullivanpt/bootstrap,connyay/bootstrap,RobJacobs/bootstrap,benhalverson/bootstrap,BookingBug/bootstrap,wesleycho/bootstrap,matteopic/bootstrap,Servoy/bootstrap